WBJEE · Physics · Ray Optics
There is a small air bubble at the centre of a solid glass sphere of radius \(r\) and refractive index \(\mu .\) What will be the apparent distance of the bubble from the centre of the sphere, when viewed from outside?
- A r
- B \(\frac{r}{\mu}\)
- C \(r\left(1-\frac{1}{\mu}\right)\)
- D Zero
Answer & Solution
Correct Answer
(D) Zero
Step-by-step Solution
Detailed explanation
' As the object is at centre of the sphere. \(\therefore\) All rays will fall normally on surface, hence they do not deflect. Thus, a virtual image is formed at the centre \(O\). \(\therefore\) Apparent depth \(=\) Real depth
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